output-style-engineering SKILL.md skillA
output-style-engineering from xobotyi/cc-foundry is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add xobotyi/cc-foundry/output-style-engineering@git:20260829.245c665Pins git:20260829.245c665 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- xobotyi/cc-foundry
- Path
plugins/ai-helpers/skills/output-style-engineering/SKILL.md- Versions recorded
- 5
- Latest version
- git:20260829.245c665, committed Aug 29, 2026
- First version recorded
- Aug 17, 2026
- Size
- 13,405 bytes
- Repository stars
- 23
- License
- MIT
Design and maintain Claude Code output styles: choosing the mechanism, setting the frontmatter, and writing the role, voice, and rules the style installs in the system prompt.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
**An output style modifies the system prompt.** It holds two powers no alternative has: it turns part of the default prompt off, and the harness reinforces it with adherence reminders through the conversation. Every other file-based mechanism only adds text, and then competes with the default it could not remove. <prerequisite> An output style is a system prompt. Invoke `prompt-engineering` for the wording, instruction budget, and timelessness rules that govern every line written here. This skill covers only what is specific to the output-style artifact — the mechanism choice, the frontmatter, and the register the style installs. </prerequisite> ## Choose the mechanism first - **Use a style when the role or the register must change and hold for a whole session.** The body lives in the system prompt, so it survives compaction, and the harness reminders carry adherence without persistence prose in the body. - **Additive mechanisms stay additive.** CLAUDE.md arrives as a user message after the system prompt, and `--append-system-prompt` appends for one session; neither removes the default the body is arguing with. A body that …
Read the whole file at its exact version.
How to install
mdr add xobotyi/cc-foundry/output-style-engineering@sha256:ab157a3346bd0feeThe line at the top of this page pins the label git:20260829.245c665, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_gddo76kozbeljjeh)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 5 versions of this file, between Aug 17, 2026 and Aug 29, 2026, about one every 3 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260829.245c665 latest | 2026-08-29 | 245c665 | 13,405 B | A | view · diff |
| git:20260828.1800add | 2026-08-28 | 1800add | 10,168 B | A | view · diff |
| git:20260828.2e38d3c | 2026-08-28 | 2e38d3c | 17,692 B | A | view · diff |
| git:20260823.9692888 | 2026-08-23 | 9692888 | 17,844 B | A | view · diff |
| git:20260817.c154f9c | 2026-08-17 | c154f9c | 17,193 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (13405 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
xobotyi/cc-foundry · 23 stars · license MIT · pushed 2026-10-31 · branch master
API
GET https://markdownregistry.com/api/v1/artifacts/art_gddo76kozbeljjeh GET https://markdownregistry.com/api/v1/resolve?ref=xobotyi/cc-foundry/output-style-engineering GET https://markdownregistry.com/api/v1/blob/ab157a3346bd0fee274977e59b1982f9fab3177e8fe28d094f36a306788f75f5
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.